GB963556A - A process for preventing deposition of boiler scale and corrosion in heating systems - Google Patents

A process for preventing deposition of boiler scale and corrosion in heating systems

Info

Publication number
GB963556A
GB963556A GB3692462A GB3692462A GB963556A GB 963556 A GB963556 A GB 963556A GB 3692462 A GB3692462 A GB 3692462A GB 3692462 A GB3692462 A GB 3692462A GB 963556 A GB963556 A GB 963556A
Authority
GB
United Kingdom
Prior art keywords
hydrazine
acid
salt
water
corrosion
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB3692462A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bayer AG
Original Assignee
Bayer AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bayer AG filed Critical Bayer AG
Publication of GB963556A publication Critical patent/GB963556A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • C23F11/00—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent
    • C23F11/08—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in other liquids
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/68—Treatment of water, waste water, or sewage by addition of specified substances, e.g. trace elements, for ameliorating potable water
    • C02F1/685—Devices for dosing the additives
    • C02F1/686—Devices for dosing liquid additives
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
    • C02F5/08—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
    • C02F5/08—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents
    • C02F5/10—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances
    • C02F5/12—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances containing nitrogen
    • C02F5/125—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances containing nitrogen combined with inorganic substances
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28G—CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
    • F28G9/00—Cleaning by flushing or washing, e.g. with chemical solvents

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Water Supply & Treatment (AREA)
  • Environmental & Geological Engineering (AREA)
  • Hydrology & Water Resources (AREA)
  • General Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Metallurgy (AREA)
  • Medicinal Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Materials Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Preventing Corrosion Or Incrustation Of Metals (AREA)

Abstract

Deposition of boiler scale and corrosion in heating systems are prevented by adding to the water an amino-polycarboxylic acid or an alkali metal or hydrazine salt thereof, in amounts more than 0.0001%, and from 0.0001-1.0% of hydrazine. The actual amount of amino-polycarboxylic acid or salt thereof depends on the amount of salt causing hardness in the water, and the amount of hydrazine is such that there is a small excess always present in the water. The amino-polycarboxylic acid or salt thereof consists of ethylene diamine tetra-acetic acid, nitrilo-triacetic acid, the alkali metal salts thereof or the hydrazine salts of diamine tetraacetic acid; and said acid is capable of forming stable complexes with metal ions. Preferably an excess of 0.1 mg./l. of hydrazine is always present in the water.
GB3692462A 1961-10-13 1962-09-28 A process for preventing deposition of boiler scale and corrosion in heating systems Expired GB963556A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEF35136A DE1222444B (en) 1961-10-13 1961-10-13 Procedure to prevent stone deposits and corrosion

Publications (1)

Publication Number Publication Date
GB963556A true GB963556A (en) 1964-07-08

Family

ID=7095870

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3692462A Expired GB963556A (en) 1961-10-13 1962-09-28 A process for preventing deposition of boiler scale and corrosion in heating systems

Country Status (3)

Country Link
AT (1) AT239717B (en)
DE (1) DE1222444B (en)
GB (1) GB963556A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3296027A (en) * 1964-11-19 1967-01-03 Nalco Chemical Co Removal and inhibition of scale formation in steam generation

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2378842A1 (en) * 1977-01-27 1978-08-25 Olin Corp Hydrazine compsn. contg. cobalt or manganese complex - used for treating fluid corrosive environment

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1111900B (en) * 1958-09-20 1961-07-27 Dr Eberhard Krietsch High temperature resistant inhibitors to prevent hot water corrosion

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3296027A (en) * 1964-11-19 1967-01-03 Nalco Chemical Co Removal and inhibition of scale formation in steam generation

Also Published As

Publication number Publication date
AT239717B (en) 1965-04-26
DE1222444B (en) 1966-08-04

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